INTRODUCTION. 
Cl 
as to form a kind of roof over it, the ridge of which 
is some times sharp, at other times rounded. The 
Cinnabar-moth (PI. 21. fig. 2.) affords an example 
of the former, the Goat-moth (PI. 14. fig. 2.) of the 
latter. Many of the smaller moths C Tiniw J have 
their wings convoluted, or rolled round the body so 
as completely to embrace it. Others, contrasting 
with these, keep them always fully expanded, so 
that the posture maintained in flight is scarcely 
changed when they alight ; of this description are 
several of the brindled-moths, common in gardens, 
produced from geometer caterpillars which feed on 
fruit trees. In some genera the under wings project 
considerably beyond the upper, as may be seen in 
the Lappet-moth. It may likewise be noticed that 
several of the small Torlricidm are remarkable for 
having a sudden and deep emargination on the 
anterior edge of the upper wings, as if a semicircular 
portion were cut out ; whence they are known to 
collectors by the epithet of Notch-wing moths. 
A difierence in the port of the wings is sometimes 
a sexual distinction, but that is often marked in a 
more decided manner. On this subject it may be 
regarded as the most general rule, that the female, 
contrary to what is observed in many of the higher 
animals, is larger than the male, sometimes even 
double the size*. The greater or less development 
of the antennae has been already mentioned as occa- 
* In the clouded Bnfif-moth f EutTiemonia Russula ), and a 
few other species, the female, however, is considerably smaller 
than the other se.v. 
